21.   The delay also provides time to buy and install machinery to detect explosives in checked bags.

22.   The FAA has acknowledged holes in the security net and concedes that checked bags are not routinely screened for weapons or explosive materials.

23.   The government has not yet certified that this technology is as reliable for screening unopened checked bags.

24.   The Federal Aviation Administration should also require domestic carriers to match every checked bag with an on-board passenger, as is the case with foreign flights.

25.   The limit on checked bags has not changed, but airline officials advise passengers to be prepared to have those bags searched at the check-in counter.

26.   The security measure requires airlines to match every checked bag to a passenger and ensures that no bag is loaded onto a plane unless the owner also boards.

27.   The threat had been expected to come from terrorists planting bombs in checked bags.

28.   The traditional test method is for FAA undercover agents to put a weapon or a bomb into a carry-on or checked bag and see if the screeners notice.

29.   Unfortunately, my bits of history were stolen from a checked bag on the return flight to the United States.

30.   What are the chances that a checked bag will be scanned for explosives?